Pesticides

Question 1

At what height can annual bluegrass be mowed and still produce seed?

Answer 1

1/8 inch

Question 2

What can control annual bluegrass in most turfgrass sites

Answer 2

preemergence and post emergence.

Question 3

what percentage of annual bluegrass control will preemergence herbicides control

Answer 3

80-90%

Question 4

what are two groups of herbicide formulations

Answer 4

dry and liquid

Question 5

Any additive used with an herbicide that enhances the performance or handling of the herbicide

Answer 5

Adjuvant

Question 6

A material that allows the mixing or improves the suspension of two or more formulations when applied together as a tank mix

Answer 6

Compatibility Agent

Question 7

oil based material that enhances herbicide penetration through the leaf cuticle

Answer 7

Crop Oil Concentrate

Question 8

A material that eliminates or suppresses foam in the spray tank so that pumps and nozzles can operate correctly.

Answer 8

Defoamer

Question 9

A material used in a liquid spray mixtures to reduce spray drift

Answer 9

Drift Control Agent

Question 10

A material that improves the emulsifying, dispersing, spreading, wetting or other surface modifying properties of liquids.

Answer 10

Surfactant

Question 11

A material that reduces interfacial tensions between water droplets and the leaf cuticle.

Answer 11

Wetting agent

Question 12

what are two ways to spray that will help reduce the damage to non target plants when applying herbicide?

Answer 12

Shielded Sprays and Wiper Applications

Question 13

which grass does not go completely dormant in Arkansas?

Answer 13

zoysiagrass

Question 14

What are volatile liquids or gases that control a wide range of soil borne pests?

Answer 14

Soil Fumigants

Question 15

What can be used to deactivate herbicides?

Answer 15

Activated Charcoal

Question 16

What is the rate range for using activated charcoal for herbicide accidents?

Answer 16

100-400 lbs per acre. Rule of thumb, 200 lbs per acre.

Question 17

When will a charcoal application not be effective?

Answer 17

If the herbicide has been moved into the soil due to rain or irrigation.

Question 18

What are some common steps to weed prevention?

Answer 18

1. Use weed free mulch and topdressing materials
2. Use weed free seed
3. Keep border areas weed free.
4. Wash or blow equipment between uses.

Question 19

Which Type of inhibitors are absorbed through foliage and inhibit cell division?

Answer 19

Type I

Question 20

Which Type of inhibitors are generally root absorbed and suppress growth through interference with gibberellic acid synthesis?

Answer 20

Type II

Question 21

What is an abnormal alteration in the structure and/or physiological function of a plant?

Answer 21

Plant disease

Question 22

Diseases caused by an unfavorable growing enviroent

Answer 22

Abiotic

Question 23

What makes up the disease triangle?

Answer 23

Casual Agent, Susceptible Host, Favorable Environment

Question 24

what is the most common nematode?

Answer 24

root-knot

Question 25

what is responsible for most turf grass disease in Arkansas?

Answer 25

fungi

Question 26

What is a turf grass disease that cannot be controlled by chemicals?

Answer 26

SAD (St. Augustine Decline) caused by a panicum virus.

Question 27

What is a way to control Take-All patch fungus?

Answer 27

Reduce thatch since it lives on plant debris.